Recent findings challenge the long-standing belief that tension-free abdominal wall closure is necessary for successful postoperative outcomes.
A study, led by Ryan C Ellis, a general surgery resident at the Cleveland Clinic Foundation, Ohio, revealed that myofascial tension during closure showed no correlation with adverse short-term postoperative outcomes.
The research was presented at the 2023 annual meeting of the American Hernia Society.
It involved a post hoc analysis of 100 patients who underwent posterior component separation followed by transversus abdominis release (TAR) between January and July 2022.
The study utilised an innovative intraoperative tensiometer developed by Cleveland Clinic’s Mechanical Prototyping Core to measure tension levels.
Surprisingly, despite initial concerns, the study found no significant association between baseline tension, change in tension during closure and tension at closure with common postoperative complications such as surgical site infections, readmissions, ileus or bleeding requiring transfusion.
Eric Pauli, MD, chief of the Division of Minimally Invasive and Bariatric Surgery at Penn State Health Milton S Hershey Medical Centre, commented on the study, suggesting that a ‘tension-free repair’ might have been misunderstood.
He highlighted the natural tension in the abdominal wall, which is necessary for maintaining posture and basic functions, indicating that a certain tension level might be physiologically beneficial.
Dr Pauli emphasised that the primary goal of hernia repair should be to reinforce the abdominal cavity with mesh rather than solely focusing on reducing tension across the closure.
He said: ‘When we think about a good hernia repair, it should re-create normal tension levels across the abdominal wall. We don’t know how much tension is too much on a repair and whether that tension results in increased failures.
‘It may be that the closure is less important than having a wide overlap. But I think this study lends a little support to that argument. The abdominal wall might be a little tighter in this patient with a large hernia than in this patient with a smaller hernia, but if the repairs are done similarly – make a large retromuscular pocket, maybe release the transversus abdominis muscle, place wide mesh overlap – you can get similar short- and hopefully long-term outcomes with those two patients.’
Dr Ellis and his team conducted additional research measuring tension in patients without hernias undergoing primary laparotomy, revealing a physiologic tension level significantly lower than previously assumed.
These findings challenge traditional surgical dogma surrounding abdominal wall tension and call for reconsidering the approach to hernia repair, with potential implications for improving surgical outcomes and patient care.
